The city unanimously approved the requirement, which applies to at least 200 buildings.
Renewables & Efficiency
All 212 supermarkets are sending food waste to a biogas plant, which powers its distribution center.
India could even soar past its jaw-dropping goal of installing 100 gigawatts of solar by 2022.
First steps are being taken toward remotely operating rooftop solar systems, turning them into power plants.
In Africa, tiny solar systems are set to take off on a mass scale this year.
After crushing its renewable energy industry, the new prime minister is trying to revive it a bit.
Energy efficiency is the biggest employer by far, with 1.9 million jobs.
Research shows in ever more compelling ways that we can transform US energy rapidly and affordably.
The solar industry officially has a seat at the table with the largest energy producers.
Energy efficiency, renewables and less use of coal are finally making an impact on global emissions.